Please help 🥺

AF is 3 days late. My nipples are a little tender, mood swings and faint cramps every few days but they don’t last long at all. I have also been getting a lot of CM that you see in the last pic and I did do my BBT and my temp spiked to 99.4 on CD 25. Is it possible an egg fertilized on that day? Has this happened to anyone?? I had a negative test.